Journal Article

PUBDB-2026-02557

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Impact of temperature and ion concentration on optical properties of Sm$^{3+}$-doped KLaSiO$_4$ phosphors

Komar, J. ; Rebrova, N.Extern* ; Lisiecki, R. (Corresponding author)Extern*

2026
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.saa.2026.128472  doi:10.3204/PUBDB-2026-02557

Abstract: Since red light stimulates plant photosynthesis, enhancing growth and flowering, the development of new red phosphors with intense emission and excellent thermalstability is crucial for improving the efficiency of artificial white LED lighting. In this study, a novel orange-red phosphor KLaSiO4:Sm3+, was synthesized for the firsttime using a sol–gel method. This silicate phosphor exhibits stable orange-red emission in the 550–750 nm range upon excitation at 405 nm. The color temperaturewas determined to be 1575 K, and the excellent color purity reached 92%, owing to the most prominent emission bands at 599 nm and 648 nm. Synchrotron radiationwas employed to verify Sm3+ optical qualities, especially in VUV -UV spectral region. Radiative transitions from 4G5/2 excited state are favorably still effective evenfor heavily doped KLaSiO4:Sm3+ phosphors. The 0.7%/K 1 relative temperature sensitivity was acquired for ESA/GSA single band thermometric approach.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20240170 EC (I-20240170-EC) (I-20240170-EC)
3. NEPHEWS - NEutrons and PHotons Elevating Worldwide Science (NEPHEWS) (101131414) (101131414)

Experiment(s):

1. PETRA Beamline P66 (PETRA III)

Appears in the scientific report 2026

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